43 _mbclrch(WINDOW *win, int y, int x)  in _mbclrch()  argument
49 	wcp = win->_y[y];  in _mbclrch()
62 	if (ep > wcp + win->_maxx)  in _mbclrch()
67 	if ((x = (int)(wp - wcp)) < win->_firstch[y])  in _mbclrch()
69 		win->_firstch[y] = (short)x;  in _mbclrch()
71 	if ((x = (int)(ep - wcp) - 1) > win->_lastch[y])  in _mbclrch()
73 		win->_lastch[y] = (short)x;  in _mbclrch()
77 		*wp = win->_bkgd;  in _mbclrch()
91 _mbvalid(WINDOW *win)  in _mbvalid()  argument
99 	x = win->_curx;  in _mbvalid()
100 	wcp = win->_y[win->_cury];  in _mbvalid()
105 	ecp = wcp + win->_maxx;  in _mbvalid()
134 	if (isedge || win->_insmode)  in _mbvalid()
136 		win->_curx = (short)(wp-wcp);  in _mbvalid()
147 _mbaddch(WINDOW *win, chtype a, chtype c)  in _mbaddch()  argument
164 	a |= win->_attrs;  in _mbaddch()
170 		wch = win->_waitc;  in _mbaddch()
173 		if (ty > 0 || win->_nbyte < 0) {  in _mbaddch()
176 			win->_nbyte = cswidth[ty] + (ty == 0 ? 0 : 1);  in _mbaddch()
177 			win->_index = 1;  in _mbaddch()
181 			wch[win->_index] = (char)wc;  in _mbaddch()
182 			win->_index += 1;  in _mbaddch()
186 		if (win->_index < win->_nbyte)  in _mbaddch()
190 		nbyte = win->_nbyte;  in _mbaddch()
191 		win->_nbyte = -1;  in _mbaddch()
196 		if (len > win->_maxx || 2*len < nbyte)  in _mbaddch()
200 		if ((win->_curx + len) > win->_maxx &&  in _mbaddch()
201 		    (win->_insmode || waddch(win, '\n') == ERR))  in _mbaddch()
204 		y = win->_cury;  in _mbaddch()
205 		x = win->_curx;  in _mbaddch()
206 		wcp = win->_y[y] + x;  in _mbaddch()
208 		if (win->_insmode) {  in _mbaddch()
210 			if (_mbinsshift(win, len) == ERR)  in _mbaddch()
216 				    _mbclrch(win, y, x + m) == ERR)  in _mbaddch()
236 		win->_y[y][x] &= ~CBIT;  in _mbaddch()
238 		if (win->_insmode == FALSE) {  in _mbaddch()
239 			if (x < win->_firstch[y])  in _mbaddch()
241 				win->_firstch[y] = (short)x;  in _mbaddch()
242 			if ((x += len-1) >= win->_maxx)  in _mbaddch()
243 				x = win->_maxx-1;  in _mbaddch()
244 			if (x > win->_lastch[y])  in _mbaddch()
246 				win->_lastch[y] = (short)x;  in _mbaddch()
248 			if ((win->_curx += len) >= win->_maxx) {  in _mbaddch()
249 				if (y >= (win->_maxy-1) || y == win->_bmarg) {  in _mbaddch()
250 					win->_curx = win->_maxx-1;  in _mbaddch()
251 					if (wscrl(win, 1) == ERR)  in _mbaddch()
254 					win->_cury += 1;  in _mbaddch()
255 					win->_curx = 0;  in _mbaddch()